A reexamination of end-point and rebound nystagmus in normals.
In order to detail the characteristics of end-point (EPN) and rebound nystagmus (RN), two series of experiments were performed with infrared oculography for measurement of horizontal eye movements. Experiment 1 consisted of EPN recordings during sustained lateral gaze (40 degrees and 50 degrees) in 20 normal subjects. Experiment 2 consisted of recordings of RN in 5 normal subjects. Nine of 20 subjects demonstrated a jerk EPN. EPN almost always appeared immediately and was sustained for 15-25 sec. In Experiment 2, RN occurred in 5 of the 5 subjects who demonstrated EPN. The mean amplitude of RN was always less than that of EPN, and decayed over a 5-10-sec time period. The experiment demonstrated that RN can be evoked in normals even when a fixation target, in a fully lit room, is present.
Shallo-Hoffmann
J
J
Department of Strabismology and Neuroophthalmology, University of Göttingen, Federal Republic of Germany.
Schwarze
H
H
Simonsz
H J
HJ
Mühlendyck
H
H
D000328:Adult; D003623:Dark Adaptation; D004584:Electronystagmography; D005260:Female; D005403:Fixation, Ocular / Q000502:physiology; D006801:Humans; D008297:Male; D009760:Nystagmus, Physiologic / Q000502:physiology*